<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 按钮 -->
      <el-row>
        <el-col>
          <el-button type='primary' @click='showAddCateDialog'>添加分类</el-button>
        </el-col>
      </el-row>

      <!-- 表格 -->
      <tree-table class='treeTable' :data='cateList' :columns='columns' :selection-type='false' :expand-type='false' show-index index-text='#' border>
        <template slot='isok' slot-scope="scope">
          <i class="el-icon-success" v-if='scope.row.cat_deleted === false' style="color: lightgreen;"></i>
          <i class="el-icon-error" v-else style="color: red;"></i>
        </template>
        <!-- 排序 -->
        <template slot='order' slot-scope="scope">
          <el-tag size='mini' v-if='scope.row.cat_level === 0'>一级</el-tag>
          <el-tag type='success' size='mini' v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag type='warning' size='mini' v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot='opt'>
          <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
        </template>
      </tree-table>

      <!-- 分页功能 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>

    <!-- 添加分类的对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%">
      <el-form :model="addCateForm" :rules="addCateRules" ref="addCateRef" label-width="100px">
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="{ expandTrigger: 'hover', value:'cat_id',label:'cat_name',children:'children',}"
            @change="parentCateChanged"></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCateDialogVisible = false">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      cateList: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateRules: {
        cat_name: [
          { required: true, message: '请输入用户名', trigger: 'blur' }
        ]
      },
      parentCateList: [],
      // cascaderProp: {
      //   value: 'cat_id',
      //   label: 'cat_name',
      //   children: 'children'
      // },
      selectedKeys: []
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品失败')
      }
      // 把数据表列表赋值给cateList
      this.cateList = res.data.result
      // 为总数据条数赋值
      this.total = res.data.total
    },
    // 监听pagesize改变事件
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    // 监听pagenum改变事件
    handleCurrentChange (newNum) {
      this.queryInfo.pagenum = newNum
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父类数据失败')
      }
      // console.log(res)
      this.parentCateList = res.data
    },
    parentCateChanged () {
      console.log(this.selectedKeys)
    }
  }
}
</script>

<style>
.treeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
}
</style>
